CN103788343A - VOC (Volatile Organic Compounds)-free water-based epoxy curing agent - Google Patents
VOC (Volatile Organic Compounds)-free water-based epoxy curing agent Download PDFInfo
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- CN103788343A CN103788343A CN201410037397.1A CN201410037397A CN103788343A CN 103788343 A CN103788343 A CN 103788343A CN 201410037397 A CN201410037397 A CN 201410037397A CN 103788343 A CN103788343 A CN 103788343A
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- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 70
- 239000004593 Epoxy Substances 0.000 title claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 239000012855 volatile organic compound Substances 0.000 title abstract 4
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 40
- 239000003822 epoxy resin Substances 0.000 claims abstract description 36
- 238000002360 preparation method Methods 0.000 claims abstract description 25
- 239000006185 dispersion Substances 0.000 claims abstract description 16
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims abstract description 12
- -1 amine compound Chemical class 0.000 claims abstract description 9
- 239000008367 deionised water Substances 0.000 claims abstract description 9
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- 150000001412 amines Chemical class 0.000 claims abstract description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 6
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000009413 insulation Methods 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 9
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 6
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 claims description 6
- 238000004821 distillation Methods 0.000 claims description 6
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- 238000000034 method Methods 0.000 claims description 6
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 5
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 claims description 5
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 125000003700 epoxy group Chemical group 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- 229920001451 polypropylene glycol Polymers 0.000 claims description 5
- 229960001124 trientine Drugs 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 4
- 238000010792 warming Methods 0.000 claims description 4
- SHKUUQIDMUMQQK-UHFFFAOYSA-N 2-[4-(oxiran-2-ylmethoxy)butoxymethyl]oxirane Chemical compound C1OC1COCCCCOCC1CO1 SHKUUQIDMUMQQK-UHFFFAOYSA-N 0.000 claims description 3
- WTYYGFLRBWMFRY-UHFFFAOYSA-N 2-[6-(oxiran-2-ylmethoxy)hexoxymethyl]oxirane Chemical compound C1OC1COCCCCCCOCC1CO1 WTYYGFLRBWMFRY-UHFFFAOYSA-N 0.000 claims description 3
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 3
- NSOXQYCFHDMMGV-UHFFFAOYSA-N Tetrakis(2-hydroxypropyl)ethylenediamine Chemical compound CC(O)CN(CC(C)O)CCN(CC(C)O)CC(C)O NSOXQYCFHDMMGV-UHFFFAOYSA-N 0.000 claims description 3
- FDLQZKYLHJJBHD-UHFFFAOYSA-N [3-(aminomethyl)phenyl]methanamine Chemical compound NCC1=CC=CC(CN)=C1 FDLQZKYLHJJBHD-UHFFFAOYSA-N 0.000 claims description 3
- LHIJANUOQQMGNT-UHFFFAOYSA-N aminoethylethanolamine Chemical compound NCCNCCO LHIJANUOQQMGNT-UHFFFAOYSA-N 0.000 claims description 3
- PGEAEAYLSCKCCO-UHFFFAOYSA-N benzene;n-methylmethanamine Chemical compound CNC.C1=CC=CC=C1 PGEAEAYLSCKCCO-UHFFFAOYSA-N 0.000 claims description 3
- 229940106691 bisphenol a Drugs 0.000 claims description 3
- 150000004985 diamines Chemical class 0.000 claims description 3
- ZZTCPWRAHWXWCH-UHFFFAOYSA-N diphenylmethanediamine Chemical compound C=1C=CC=CC=1C(N)(N)C1=CC=CC=C1 ZZTCPWRAHWXWCH-UHFFFAOYSA-N 0.000 claims description 3
- 239000011737 fluorine Substances 0.000 claims description 3
- 229910052731 fluorine Inorganic materials 0.000 claims description 3
- SYECJBOWSGTPLU-UHFFFAOYSA-N hexane-1,1-diamine Chemical compound CCCCCC(N)N SYECJBOWSGTPLU-UHFFFAOYSA-N 0.000 claims description 3
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 claims description 3
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 claims description 3
- 238000007259 addition reaction Methods 0.000 claims description 2
- 125000003368 amide group Chemical group 0.000 claims description 2
- 239000003643 water by type Substances 0.000 claims description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052725 zinc Inorganic materials 0.000 abstract description 14
- 239000011701 zinc Substances 0.000 abstract description 14
- 238000000576 coating method Methods 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- 238000001035 drying Methods 0.000 abstract description 4
- 238000003860 storage Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 239000003960 organic solvent Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 18
- 238000009835 boiling Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
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- 229920000768 polyamine Polymers 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000005562 fading Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 150000007524 organic acids Chemical class 0.000 description 3
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- 239000000376 reactant Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
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- 239000010959 steel Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000013456 study Methods 0.000 description 2
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 1
- 239000009261 D 400 Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 238000005338 heat storage Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention belongs to the field of chemical coatings, and specifically relates to a VOC (Volatile Organic Compounds)-free water-based epoxy curing agent. The curing agent comprises the following components in percentage by weight: 12-25% of epoxy resin, 15-30% of terminal epoxy glycidyl ether, 3-11% of polyether amine, 18-35% of an amine compound and 40-60% of deionized water. The preparation method of the curing agent comprises the following steps: preparation of an intermediate, epoxy-amine addition and dispersion by using deionized water. The preparation method of the curing agent is simple, the reaction process is easy to control, no organic solvent is used in the preparation process and the storage stability of the curing agent is good. A water-based epoxy zinc-enriched primer which is made of the curing agent has the characteristics of high drying speed, low applicable temperature, good film flexibility, high hardness, excellent corrosion resistance and the like, and can be applied to the fields such as ocean engineering, bridges, grade levels, high-speed rail facilities, wind power equipment, petrochemical engineering and heavy machinery.
Description
Technical field
The invention belongs to chemistry painting industry field, be specifically related to the zero VOC aqueous epoxy curing agent that a kind of water-based epoxy zinc-rich primer is used.
Background technology
At present China is in economic construction develop rapidly period, iron and steel when road and bridge, oceanographic engineering, boats and ships, petrochemical complex, high facilities, wind power equipment, heavy-duty machinery etc. are widely applied in main structures and equipment take steel construction, a large amount of facilities are because scrap by corrosion, and therefore anti-corrosion of metal becomes the very urgent problem facing at present.Painting anticorrosion erosion coating is to prevent the effective measure of metallic corrosion.Epoxy zinc rich primer is owing to having the galvanic protection effect of the mechanical property, chemical resistant properties, snappiness, high adhesive force of epoxy resin excellence, the extremely performance such as low volumetric shrinkage and zinc powder excellence concurrently, becomes and in metal anti-corrosive paint, applies maximum kind.The major part using is in the market conventional solvent type coating, to the healthy harmful and serious environment pollution of workmen.In recent years along with environmental requirement is more and more higher, series of standards policy such as GB24409-2009 " limits of harmful substances in car paint " etc. was executed in succession such as 2010, with the enhancing of people's environmental consciousness, the friendly water-thinned epoxy zinc-rich protective system of development environment becomes study hotspot gradually.
Aqueous epoxy coating is made up of liquid epoxies emulsion or epoxy resin water dispersion, aqueous epoxy curing agent and color stuffing.Tradition aqueous epoxy curing agent is mainly polyamine, has the shortcoming that much cannot overcome, and what can directly use is little, must be to its modification.Past mainly by introducing hydrophobicity epoxy resin segment on wetting ability polyamine molecule, improve the emulsifying property of solidifying agent and the consistency with epoxy component thereof, but this modification causes solidifying agent wetting ability to decline, for the wetting ability that improves solidifying agent need add organic acid to be neutralized into reactant salt.As a good impartial people has invented a kind of self-emulsifying aqueous epoxy resin curing agent preparation method at patent CN101649041B, the method is by realizing the Water-borne modification of solidifying agent with end-blocking salify in organic acid.Aqueous epoxy resin curing agent prepared by this method is easily subject to the impact of pH value, easily occurs unstable phenomenon with color stuffing while mixing; Be prone to and dodge rust phenomenon in the metallic matrix enterprising enforcement used time, simultaneously the organic acid contaminate environment to a certain extent of volatilizing in film preparation process.The shortcoming occurring for ion modification method, people mainly concentrate in nonionic modified method polyamine modification now, on polyamine, introduce hydrophilic polyether segment and hydrophobic epoxy resin segment.Abroad to the existing many reports of the preparation of nonionic waterborne epoxy curing agent, Domestic Scientific Research mechanism and colleges and universities have also carried out a large amount of correlative studys at present, but preparation process complexity, reaction is difficult to control, easily gel, in preparation process, reactant viscosity is high, need to add part solubility promoter; And solidifying agent storage period is generally not long.As patent CN101613460B, CN101624385B, CN102492149B, CN102190800B etc. have invented various nonionic aqueous epoxy resin curing agents, but all use in varying degrees a certain amount of organic solvent in its preparation process.
Summary of the invention
For the defect of prior art, the invention provides a kind of zero VOC aqueous epoxy curing agent, this solidifying agent is not containing solvent, obtain by certain preparation method, overcome existing solidifying agent preparation process complexity, reaction is difficult to control, easily gel, in preparation process, reactant viscosity is high, need to add the phenomenon that part solubility promoter, solidifying agent storage period are short, occur unstability after mixing with color stuffing.
For achieving the above object, technical scheme of the present invention is:
A kind of zero VOC aqueous epoxy curing agent, component and mass percent thereof are:
Described zero VOC aqueous epoxy curing agent prepares by the following method:
(1) preparation of intermediate: epoxy resin and epoxy terminated glycidyl ether are mixed and put in reactor in described ratio, and logical shielding gas limit, limit is warming up to 110 ℃～160 ℃; Then drip polyetheramine, dropwise rear insulation 3h-6h, until amido reacts completely, be finally cooled to room temperature and obtain intermediate;
(2) epoxy-amine addition reaction: aminated compounds is added to reaction unit, and logical shielding gas limit, limit is warming up to 60 ℃～90 ℃, then drips gradually the described intermediate of step (1); Dropwise insulation 3h-6h, until epoxide group reacts completely; Then excess amine compounds is removed in underpressure distillation, obtains epoxy-amide adduct;
(3) deionized water disperses: the described epoxy-amide adduct of step (2) is put in the dispersion cylinder that passes into 60 ℃～90 ℃ of recirculated waters, then dripped deionized water and disperse 25min～40min, obtain aqueous epoxy curing agent.
Described epoxy resin is preferably bisphenol-A liquid epoxy resin or Bisphenol F type liquid epoxies.
Described epoxy terminated glycidyl ether is preferably the one in following product: polyethyleneglycol diglycidylether, polypropylene glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, trishydroxymethyl triglycidyl ether.
Described polyetheramine is preferably double-end amino polyethers.
Described aminated compounds is preferably the one in following product: quadrol, hexanediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine, polyether diamine, hydroxyethylethylene diamine, trimethylammonium hexanediamine, benzene dimethylamine, mphenylenediamine, m-xylene diamine, different fluorine that ketone diamines, diaminodiphenyl-methane.
The preferred solid content of described aqueous epoxy resin curing agent is 40%～60%, and amine value is preferably 150～300mgKOH/g.
Below the present invention is further explained and is illustrated:
The principal reaction formula of step (1) and step (2) is as follows:
Described epoxy resin is bisphenol-A liquid epoxy resin or Bisphenol F type liquid epoxies, is selected from the one in following products: CYD-115, the CYD-115C of BaLing Petroleum Chemical Engineering Co., Ltd, CYD-127, CYD-128, CYD-128Y, CYD-128E, CYD-134; 628,634,601 of Xinhua Resin Factory, Shanghai; Epon828, Epon834, the Epon1001 of Shell company (now Hexion Chemical Co., Ltd.).Described epoxy terminated glycidyl ether is the one in following product: polyethyleneglycol diglycidylether, polypropylene glycol diglycidyl ether, BDDE, 1,6-hexanediol diglycidyl ether, trishydroxymethyl triglycidyl ether.Described polyetheramine is double-end amino polyethers, is selected from the one in following products: ED-600, the ED-900 of Huntsman Corporation of the U.S., ED-2003, D-230, D-400.Described aminated compounds is the one in following product: quadrol, hexanediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine, polyether diamine, hydroxyethylethylene diamine, trimethylammonium hexanediamine, benzene dimethylamine, mphenylenediamine, m-xylene diamine, different fluorine that ketone diamines, diaminodiphenyl-methane.In described intermediate preparation process, the epoxy group(ing) of pressing of epoxy resin and epoxy terminated glycidyl ether is pressed certain mol proportion mixing, and this mol ratio is 3:1～1:3.Described aqueous epoxy resin curing agent solid content is 40%～60%, and amine value is 150～300mgKOH/g.
Compared with prior art, the present invention has the following advantages:
(1) aqueous epoxy curing agent that the present invention makes does not add any organic solvent in preparation process, solidifying agent zero VOC, the environmental friendliness that make.
(2) in the aqueous epoxy curing agent preparation process that the present invention makes, introduced hydrophilic polyether segment, itself has emulsifying effect, without additional emulsifying agent, good with the consistency of epoxy resin, is not prone to unstable phenomenon together with color stuffing while use.
(3) the aqueous epoxy curing agent stability in storage that the present invention makes is high, and in thermostatic drying chamber, temperature is that under 50 ± 2 ℃ of conditions, heat storage 30 days is not stratified.
(4) make the easy self-vulcanizing of coating, rate of drying prepared by aqueous epoxy curing agent and aqueous epoxy resins by the present invention fast, surface drying time is under ℃ condition of 5～30min(10～40), do solid work time <20h.
(5) by the present invention make that hardness of film prepared by aqueous epoxy curing agent and aqueous epoxy resins is high, strong adhesion, excellent anti-corrosion performance, its hardness >=3H, 1 grade of sticking power (cross-hatching), resistance to impact shock >=50cm, water-resistance property of coating test 10 days without fading, non-corroding, acid resistance (10%HCl) test 6 days without fading, non-corroding, alkali resistance (10%NaOH) test 10 days without fading, non-corroding, resistance to neutral salt spray time >=500 hour, weathering resistance test 6 months is non-foaming, do not ftracture, non-corrosive, do not come off.
Accompanying drawing explanation
Fig. 1 embodiment 1 aqueous epoxy resin curing agent is prepared infared spectrum;
Fig. 2 water-based epoxy zinc-rich primer preparation flow figure;
Fig. 3 embodiment 5 water-based epoxy zinc-rich primer SEM figure.
Embodiment
Below in conjunction with embodiment, the present invention will be further explained, but the present invention is not limited to the scope described in embodiment.
The zero VOC aqueous epoxy curing agent and the water-based epoxy zinc-rich primer film performance thereof that make adopt following method to carry out performance characterization:
Zero VOC aqueous epoxy curing agent solid content test: with reference to GB1725-79 standard; Viscosity test: adopt NDJ-1 type Rotary Viscosimeter to measure; Size distribution test: adopt the Britain Zetasizer Nano ZS90 of Ma Erwen Instrument Ltd. laser particle size analyzer to measure; Examination of infrared spectrum: the Fourier infrared spectrograph FTIR-8300 that adopts Tianjin Ao Tesaiensi Instrument Ltd. to produce carries out infrared absorption test to film sample.
Water-based epoxy zinc-rich primer film performance test: pencil hardness test: GB/T6739-2006; Snappiness test: GB1731-1993; Shock-resistance test: GB1732-1993; Sticking power (cross-hatching) test GB/1720-79 (89); Water resistance test: GB/T1733-1993; Acid resistance test: GB/T1763-1979; Alkali resistance test: GB/T1763-1979; Resistance to neutral salt spray test: GB/T1771-2007; Weathering resistance test: GB/T1865-1997; Sweep electron microscope (SEM) test: the Quanta200 type environmental scanning electronic microscope that adopts FEI Co. of the U.S. to produce, amplifies 5000 times of observations.
Embodiment 1: the preparation of aqueous epoxy resin curing agent 1
In the oil bath device with agitator, thermopair, condenser and constant pressure funnel, in 500ml four-hole boiling flask, add 51.6gCYD-115 and 116g polypropylene glycol diglycidyl ether, limit passes into N
2limit is heated to 100 ℃, then slowly drips 20gED-600, dropwises post-heating to 150 ℃, and insulation 4h left and right, until amino reacts completely, is finally cooled to room temperature and obtains faint yellow transparent intermediate, oxirane value 0.292mol/100g.Then adding 74.4g diethylenetriamine at same sampling device, limit passes into N
2limit is heated to 80 ℃, then slowly drips 170g intermediate, after dropwising, and insulation 4h left and right, until epoxide group reacts completely, then unnecessary amine is removed in underpressure distillation, obtains affixture; Affixture is added to dispersion cylinder, pass into after the recirculated water of 90 ℃, add 250g deionized water high speed dispersion 35min to make aqueous epoxy resin curing agent.Solidifying agent performance index are as table 1, and infrared spectrum is as Fig. 1.
The performance index of table 1 embodiment 1 aqueous epoxy resin curing agent 1
| Project | Performance |
| Outward appearance | Faint yellow transparent |
| Solid content | 52.0% |
| Viscosity (15 ℃) | 2700mPa.S |
| Amine value | 152mgKOH/g |
| Thermodynamic stability (50 ℃, 30 days) | Not stratified |
| Centrifugal stability (3000r/min, 30min) | Not stratified |
Embodiment 2: the preparation of aqueous epoxy resin curing agent 2
In 500ml four-hole boiling flask in the oil bath device with agitator, thermopair, condenser and constant pressure funnel, add 39.2g CYD-127 and 78g polypropylene glycol diglycidyl ether, limit passes into N
2limit is heated to 110 ℃, then slowly drips 14g ED-600, dropwises post-heating to 160 ℃, and insulation 4h left and right, until amino reacts completely, is finally cooled to room temperature and obtains faint yellow transparent intermediate, and oxirane value is 0.289mol/100g.Then in same sampling device, add 51.6g triethylene tetramine, limit passes into N
2limit is heated to 80 ℃, then slowly drips 110g intermediate, after dropwising, and insulation 5h left and right, until epoxide group reacts completely, then unnecessary amine is removed in underpressure distillation, obtains affixture; Affixture is added to dispersion cylinder, pass into after the recirculated water of 85 ℃, add 166g deionization high speed dispersion 30min to make aqueous epoxy resin curing agent.Solidifying agent performance index are as table 2.
The performance index of table 2 embodiment 2 aqueous epoxy resin curing agents 2
| Project | Performance |
| Outward appearance | Outward appearance is faint yellow transparent |
| Solid content | 51.2% |
| Viscosity (15 ℃) | 2300mPa.S |
| Amine value | 197mgKOH/g |
| Thermodynamic stability (50 ℃, 30 days) | Not stratified |
| Centrifugal stability (3000r/min, 30min) | Not stratified |
Embodiment 3: the preparation of aqueous epoxy resin curing agent 3
In 500ml four-hole boiling flask in the oil bath device with agitator, thermopair, condenser and constant pressure funnel, add 57g CYD-115c and 116g polyethyleneglycol diglycidylether, limit passes into N
2limit is heated to 100 ℃, then slowly drips 19.8g ED-900, dropwises post-heating to 150 ℃, and insulation 4h left and right, until amino reacts completely, is finally cooled to room temperature and obtains faint yellow transparent intermediate.Then in same sampling device, add 51.4g diethylenetriamine, limit passes into N
2limit is heated to 80 ℃, then slowly drips 80g intermediate, after dropwising, and insulation 5h left and right, until epoxide group reacts completely, then unnecessary amine is removed in underpressure distillation, obtains affixture; Affixture is added to dispersion cylinder, pass into after the recirculated water of 80 ℃, add 200g deionized water high speed dispersion 30min to obtain aqueous epoxy resin curing agent.Solidifying agent performance index are as table 3.
The performance index of table 3 embodiment 3 aqueous epoxy resin curing agents 3
| Project | Performance |
| Outward appearance | Faint yellow transparent |
| Solid content | 47.4% |
| Viscosity (15 ℃) | 1200mPa.S |
| Amine value | 165mgKOH/g |
| Thermodynamic stability (50 ℃, 30 days) | Not stratified |
| Centrifugal stability (3000r/min, 30min) | Not stratified |
Embodiment 4: the preparation of aqueous epoxy resin curing agent 4
In 500ml four-hole boiling flask in the oil bath device with agitator, thermopair, condenser and constant pressure funnel, add 38g CYD-128 and 77.4g polyethyleneglycol diglycidylether, limit passes into N
2limit is heated to 100 ℃, then slowly drips 13.2g ED-600, dropwises post-heating to 150 ℃, and insulation 5h left and right, until amino reacts completely, is finally cooled to room temperature and obtains faint yellow transparent intermediate.Then in same sampling device, add 49.6g triethylene tetramine, limit passes into N
2limit is heated to 80 ℃, then slowly drips 100g intermediate, after dropwising, and insulation 4h, until epoxide group reacts completely, then unnecessary amine is removed in underpressure distillation, obtains affixture.Affixture is added to dispersion cylinder, pass into the recirculated water of 90 ℃, add 152g deionized water high speed dispersion 35min to obtain a kind of yellow transparent aqueous epoxy resin curing agent.Solidifying agent performance index are as table 4.
The performance index of table 4 embodiment 4 aqueous epoxy resin curing agents 4
| Project | Performance |
| Outward appearance | Yellow transparent |
| Solid content | 54.3% |
| Viscosity (15 ℃) | 2800mPa.S |
| Amine value | 230mgKOH/g |
| Thermodynamic stability (50 ℃, 30 days) | Not stratified |
| Centrifugal stability (3000r/min, 30min) | Not stratified |
Embodiment 5: the preparation of water-based epoxy zinc-rich primer
Epoxy resin latex in component A in formula table, part zinc powder, anti-settling agent, dispersion agent etc. are added to dispersion cylinder, add appropriate propylene glycol monomethyl ether, stir 15min with 1500r/min high speed machine; Then add gradually residue zinc powder, continue high speed machine and stir 25min, until the color stuffing stable dispersion such as zinc powder in aqueous epoxy resin curing agent, make A component, sealing saves backup.A component and B component are added to dispersion cylinder by equivalence ratio, and with 1000～1500r/min mechanical stirring, 25min makes water-based epoxy zinc-rich primer.Priming paint preparation flow is as Fig. 2, and film shows that pattern is as Fig. 3, and water-based epoxy zinc-rich primer formula is as table 5, and film performance is as table 6.
Table 5: water-based epoxy zinc-rich primer formula table
Component A
B component
| Raw material | Weight (Kg) | Function | Supplier |
| The aqueous epoxy resin curing agent 1 of embodiment 1 | 8.90 | Solidifying agent | Self-control |
Table 6: the epoxy zinc rich primer being made by embodiment 1 and curing rear film performance thereof
When described in B component is embodiment 2-4 when solidifying agent, gained epoxy zinc rich primer and solidify after film performance with use described in embodiment 1 solidifying agent performance close.
Claims (6)
1. a zero VOC aqueous epoxy curing agent, is characterized in that, component and mass percent thereof are:
the mass percent sum of each component equals 100%;
Described zero VOC aqueous epoxy curing agent prepares by the following method:
(1) preparation of intermediate: epoxy resin and epoxy terminated glycidyl ether are mixed and put in reactor in described ratio, and logical shielding gas limit, limit is warming up to 110 ℃～160 ℃; Then drip polyetheramine, dropwise rear insulation 3h-6h, until amido reacts completely, be finally cooled to room temperature and obtain intermediate;
(2) epoxy-amine addition reaction: aminated compounds is added to reaction unit, and logical shielding gas limit, limit is warming up to 60 ℃～90 ℃, then drips gradually the described intermediate of step (1); Dropwise insulation 3h-6h, until epoxide group reacts completely; Then excess amine compounds is removed in underpressure distillation, obtains epoxy-amide adduct;
(3) deionized water disperses: the described epoxy-amide adduct of step (2) is put in the dispersion cylinder that passes into 60 ℃～90 ℃ of recirculated waters, then dripped deionized water and disperse 25min～40min, obtain aqueous epoxy curing agent.
2. zero VOC aqueous epoxy curing agent according to claim 1, is characterized in that, described epoxy resin is bisphenol-A liquid epoxy resin or Bisphenol F type liquid epoxies.
3. zero VOC aqueous epoxy curing agent according to claim 1, it is characterized in that, described epoxy terminated glycidyl ether is the one in following product: polyethyleneglycol diglycidylether, polypropylene glycol diglycidyl ether, 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, trishydroxymethyl triglycidyl ether.
4. zero VOC aqueous epoxy curing agent according to claim 1, is characterized in that, described polyetheramine is double-end amino polyethers.
5. zero VOC aqueous epoxy curing agent according to claim 1, it is characterized in that, described aminated compounds is the one in following product: quadrol, hexanediamine, diethylenetriamine, triethylene tetramine, tetraethylene pentamine, polyether diamine, hydroxyethylethylene diamine, trimethylammonium hexanediamine, benzene dimethylamine, mphenylenediamine, m-xylene diamine, different fluorine that ketone diamines, diaminodiphenyl-methane.
6. according to the described zero VOC aqueous epoxy curing agent of one of claim 1-5, it is characterized in that, the solid content of described aqueous epoxy resin curing agent is 40%～60%, and amine value is 150～300mgKOH/g.
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